package com.ruoyi.common.utils.wxlogin;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.*;

/**
 * Created by Song on 2016/11/28.
 * 基于HttpClient提供网络访问工具
 */
public final class NetUtil {
    public static CloseableHttpClient httpClient = HttpClientBuilder.create().build();

    /**
     * get请求获取String类型数据
     * @param url 请求链接
     * @return
     */
    public static String get(String url){
        StringBuffer sb = new StringBuffer();
       
        try {
        	HttpGet httpGet = new HttpGet(url);
            HttpResponse response = httpClient.execute(httpGet);           //1
            HttpEntity entity = response.getEntity();
            InputStreamReader reader = new InputStreamReader(entity.getContent(),"utf-8");
            char [] charbufer;
            while (0<reader.read(charbufer=new char[10])){
                sb.append(charbufer);
            }
        }catch (Exception e){//1
            e.printStackTrace();
            System.out.println("requestError:"+e.getMessage());
        }
        return sb.toString();
    }

    /**
     * post方式请求数据
     * @param url 请求链接
     * @param data post数据体
     * @return
     */
    @SuppressWarnings("unchecked")
    public static String post(String url, Map<String,String> data){
        StringBuffer sb = new StringBuffer();
        HttpPost httpPost = new HttpPost(url);
        List<NameValuePair> valuePairs = new ArrayList<NameValuePair>();
        if(null != data) {
            for (String key : data.keySet()) {
                valuePairs.addAll((Collection<? extends NameValuePair>) new BasicNameValuePair(key, data.get(key)));
            }
        }
        try {
            httpPost.setEntity(new UrlEncodedFormEntity((List<? extends NameValuePair>) valuePairs));
            HttpResponse response = httpClient.execute(httpPost);
            HttpEntity httpEntity = response.getEntity();
            BufferedInputStream bis = new BufferedInputStream(httpEntity.getContent());
            byte [] buffer;
            while (0<bis.read(buffer=new byte[128])){
                sb.append(new String(buffer,"utf-8"));
            }
        }catch (UnsupportedEncodingException e){//数据格式有误
            e.printStackTrace();
        }catch (IOException e){//请求出错
            e.printStackTrace();
        }finally {
            httpPost.releaseConnection();
        }
        return sb.toString();
    }
    
    /**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url 发送请求的 URL
	 * @param param 请求参数
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, Map<String, ?> paramMap) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        
        String param = "";
		Iterator<String> it = paramMap.keySet().iterator();
		
		while(it.hasNext()) {
			String key = it.next();
			param += key + "=" + paramMap.get(key) + "&";
		}
		
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
        	e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }

    
    
 }